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| 型号： | TFBS6712-TR3 |
| 厂商： | Vishay Intertechnology,Inc. |
| 英文描述： | Low Profile Fast Infrared Transceiver (FIR, 4 Mbit/s) for IrDA Applications with Low voltage Logic (1.8 V) |
| 中文描述： | 超薄快速红外线收发器（4兆飞行情报区/秒）与低电压逻辑（1.8伏的IrDA应用） |
| 文件页数： | 7/14页 |
| 文件大小： | 228K |
| 代理商： | TFBS6712-TR3 |
www.vishay.com
276
Document Number
8
4674
Rev. 1.2, 21-Feb-07
TFBS6712
Vishay Semiconductors
Recommended Circuit Diagram
Operated at a clean low impedance power supply the
TFBS6712 needs no additional external components.
However, depending on the entire system design and
board layout, additional components may be required
(see figure 3).
The capacitor C1 is buffering the supply voltage and
eliminates the inductance of the power supply line.
This one should be a Tantalum or other fast capacitor
to guarantee the fast rise time of the IRED current.
Vishay transceivers integrate a sensitive receiver and
a built-in power driver. The combination of both needs
a careful circuit board layout. The use of thin, long,
resistive and inductive wiring should be avoided. The
inputs (TXD, SD) and the output RXD should be
directly (DC) coupled to the I/O circuit.
The capacitor C2 combined with the resistor R2 is the
low pass filter for smoothing the supply voltage.
R2, C1 and C2 are optional and dependent on the
quality of the supply voltages V
CCx
and injected
noise. An unstable power supply with dropping volt-
age during transmission may reduce the sensitivity
(and transmission range) of the transceiver.
The placement of these parts is critical. It is strongly
recommended to position C2 as close as possible to
the transceiver power supply pins.
A Tantalum capacitor should be used for C1 while a
ceramic capacitor is used for C2.
In addition, when connecting the described circuit to
the power supply, low impedance wiring should be
used.
When extended wiring is used the inductance of the
power supply can cause dynamically a voltage drop
at V
CC2
. Often some power supplies are not able to
follow the fast current rise time. In that case another
4.7 μF (type, see tavle under C1) at V
CC2
will be help-
ful.
Keep in mind that basic RF-design rules for circuit
design should be taken into account. Especially
longer signal lines should not be used without termi-
nation. See e.g. "The Art of Electronics" Paul Horo-
witz, Winfield Hill, 19
8
9, Cambridge University Press,
ISBN: 0521370957.
Table 1. Recommended Application Circuit Compo-
nents
I/O and Software
In the description, already different I/Os are men-
tioned. Different combinations are tested and the
function verified with the special drivers available
from the I/O suppliers. In special cases refer to the I/
O manual, the Vishay application notes, or contact
directly Vishay Sales, Marketing or Application.
Figure 3. Recommended Application Circuit
IRED Anode
V
CC
Gro
u
nd
SD
TXD
RXD
V
CC2
V
CC1
G
N
D
SD
TXD
RXD
R1
R2
C1
C2
19430
Component
C1
Recommended Value
4.7 μF, 16 V
Vishay part#:
293D 475X9 016B
0.1 μF, Ceramic
Vishay part#:
VJ1 206 Y 104 J XXMT
C2
R1
3.3 V supply voltage
: no resistor necessary, the
internal controller is able to control the current
4.7
Ω
, 0.125 W
R2
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|---|---|
| TFBS6712-TT3 | 功能描述:红外收发器 FIR 4Mbit/s 2.4-3.6V Op Voltage RoHS:否 制造商:Vishay Semiconductors 波长:900 nm 连续数据传输:115.2 Kbit/s 传输距离:1 m 辐射强度:60 mW/sr 半强度角度:44 deg 脉冲宽度:2 us 最大上升时间:100 ns 最大下降时间:100 ns LED 电源电压:- 0.5 V to 6 V 最大正向电流:80 mA 工作电压:2.4 V to 5.5 V 最大工作温度:+ 85 C 最小工作温度:- 25 C 尺寸:6 mm x 3.1 mm x 1.9 mm 封装 / 箱体: 封装:Reel |
| TFC | 功能描述:保险丝 TFC RoHS:否 制造商:Littelfuse 产品:Surface Mount Fuses 电流额定值:0.5 A 电压额定值:600 V 保险丝类型:Fast Acting 保险丝大小/组:Nano 尺寸:12.1 mm L x 4.5 mm W 安装风格: 端接类型:SMD/SMT 系列:485 |
| TFC-105-01-F-D | 制造商:Samtec Inc 功能描述:CONN SHRD HDR HDR 10 POS 1.27MM SLDR ST TH - Bulk |
| TFC-105-01-F-D-A | 制造商:Samtec Inc 功能描述:CONN SHRD HDR HDR 10 POS 1.27MM SLDR ST TH - Bulk |
| TFC-105-01-F-D-A-K | 制造商:Samtec Inc 功能描述:.050 X .050 TERMINAL STRIP - Bulk |
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